formulae Flashcards
1
Q
cone SA
A
πrs + πr²
2
Q
sphere SA
A
4πr²
3
Q
cylinder SA
A
2πr² + πdh
4
Q
pyramid SA
A
total area of faces
5
Q
cone V
A
1/3πr²h
6
Q
triangular prism V
A
1/2 x b x h x l
7
Q
rectangular prism V
A
l x w x h
8
Q
trapezoidal prism V
A
1/2 x (a+b) x h x l
9
Q
pyramid V
A
1/3 x bh
10
Q
sphere V
A
4/3πr³
11
Q
arc length
A
θ/360 x πd
12
Q
sector area
A
θ/360 x πr²
13
Q
triangle area
A
1/2 x bh
14
Q
trapezium area
A
(a+b)/2 x h
15
Q
circumference
A
2πr or πd
16
Q
circle area
A
πr²
17
Q
quadratic formula
A
-b±√b²-4ac/2a (when ax²+bx+c = 0)
18
Q
polygon interior angles formula
A
(n-2)x180/n
19
Q
polygon exterior angles formula
A
360/n
20
Q
midpoint formula
A
(x1+x2/2) , (y1+y2/2)
21
Q
gradient formula
A
rise/run OR y2-y1/x2-x1
22
Q
distance formula
A
√(x2-x1)
